// 敌方飞机类型
export enum EnemyType {
    TYPE01,
    TYPE02,
}
// 组合类型
export enum Combination {
    TYPE01,
    TYPE02,
    TYPE03,
    TYPE04,
}
// 游戏难度类型
export enum DifficultyMode {
    TYPE01,
    TYPE02,
    TYPE03,
}
// 碰撞类型
export enum CollisionType {
    PLAYER = 1 << 1,
    ENEMY = 1 << 2,
    PLAYER_BULLET = 1 << 3,
    ENEMY_BULLET = 1 << 4,
    BULLET_PROP = 1 << 5,
    BACKGROUND = 1 << 6,
}
// 子弹类型
export enum BulletPropType {
    BULLET_M,
    BULLET_H,
    BULLET_S,
}
// 子弹方向
export enum Direction {
    LEFT,
    MIDDLE,
    RIGHT,
}
// 游戏状态
export enum GameState {
    START,
    INGAME,
    OVER,
}